linux-kernel - Re: [PATCH 19/24] rtc: pm8xxx: add support for uefi offset

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Message-ID: <Y9KNzSYotgOheKZN@hovoldconsulting.com>
Date:   Thu, 26 Jan 2023 15:27:25 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maximilian Luz <luzmaximilian@...il.com>,
        linux-arm-msm@...r.kernel.org, linux-rtc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 19/24] rtc: pm8xxx: add support for uefi offset

On Thu, Jan 26, 2023 at 03:20:52PM +0100, Johan Hovold wrote:
> On many Qualcomm platforms the PMIC RTC control and time registers are
> read-only so that the RTC time can not be updated. Instead an offset
> needs be stored in some machine-specific non-volatile memory, which the
> driver can take into account.
> 
> Add support for storing a 32-bit offset from the GPS time epoch in a
> UEFI variable so that the RTC time can be set on such platforms.
> 
> The UEFI variable is
> 
>             882f8c2b-9646-435f-8de5-f208ff80c1bd-RTCInfo
> 
> and holds a 12-byte structure where the first four bytes is a GPS time
> offset in little-endian byte order.
> 
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

The Subject of this one was supposed to say "RFC" as it, like the
previous patch, is not intended to be merged just yet.

Johan